643464341 has 16 divisors (see below), whose sum is σ = 716447424. Its totient is φ = 574124544.

The previous prime is 643464337. The next prime is 643464347. The reversal of 643464341 is 143464346.

It is a cyclic number.

It is not a de Polignac number, because 643464341 - 2² = 643464337 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643464347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48290 + ... + 60156.

It is an arithmetic number, because the mean of its divisors is an integer number (44777964).

Almost surely, 2^643464341 is an apocalyptic number.

It is an amenable number.

643464341 is a deficient number, since it is larger than the sum of its proper divisors (72983083).

643464341 is a wasteful number, since it uses less digits than its factorization.

643464341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12020.

The product of its digits is 82944, while the sum is 35.

The square root of 643464341 is about 25366.5989245701. The cubic root of 643464341 is about 863.3260155344.

The spelling of 643464341 in words is "six hundred forty-three million, four hundred sixty-four thousand, three hundred forty-one".